1 files changed, 65 insertions, 0 deletions
diff --git a/src/librbd/object_map/ResizeRequest.cc b/src/librbd/object_map/ResizeRequest.cc
new file mode 100644
index 000000000..91a3140ed
--- /dev/null
+++ b/src/librbd/object_map/ResizeRequest.cc
@@ -0,0 +1,65 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/object_map/ResizeRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "osdc/Striper.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/ObjectMap.h"
+#include "cls/lock/cls_lock_client.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::object_map::ResizeRequest: "
+
+namespace librbd {
+namespace object_map {
+
+void ResizeRequest::resize(ceph::BitVector<2> *object_map, uint64_t num_objs,
+                           uint8_t default_state) {
+  size_t orig_object_map_size = object_map->size();
+  object_map->resize(num_objs);
+  if (num_objs > orig_object_map_size) {
+    auto it = object_map->begin() + orig_object_map_size;
+    auto end_it = object_map->begin() + num_objs;
+    for (;it != end_it; ++it) {
+      *it = default_state;
+    }
+  }
+}
+
+void ResizeRequest::send() {
+  CephContext *cct = m_image_ctx.cct;
+
+  std::unique_lock l{*m_object_map_lock};
+  m_num_objs = Striper::get_num_objects(m_image_ctx.layout, m_new_size);
+
+  std::string oid(ObjectMap<>::object_map_name(m_image_ctx.id, m_snap_id));
+  ldout(cct, 5) << this << " resizing on-disk object map: "
+                << "ictx=" << &m_image_ctx << ", "
+                << "oid=" << oid << ", num_objs=" << m_num_objs << dendl;
+
+  librados::ObjectWriteOperation op;
+  if (m_snap_id == CEPH_NOSNAP) {
+    rados::cls::lock::assert_locked(&op, RBD_LOCK_NAME, ClsLockType::EXCLUSIVE, "", "");
+  }
+  cls_client::object_map_resize(&op, m_num_objs, m_default_object_state);
+
+  librados::AioCompletion *rados_completion = create_callback_completion();
+  int r = m_image_ctx.md_ctx.aio_operate(oid, rados_completion, &op);
+  ceph_assert(r == 0);
+  rados_completion->release();
+}
+
+void ResizeRequest::finish_request() {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 5) << this << " resizing in-memory object map: "
+		<< m_num_objs << dendl;
+
+  std::unique_lock object_map_locker{*m_object_map_lock};
+  resize(m_object_map, m_num_objs, m_default_object_state);
+}
+
+} // namespace object_map
+} // namespace librbd